# 创建时间：2025/4/29 星期二 21:15
# 创建人：李德才
source = {"a": 1, "b": 2, "c": 3, "d": 4, "e": 5}
for key in source:
    print(key,source[key],source.get(key))

for key, value in source.items():
    print(key, value)

for key in source.keys():
    print(key)

for value in source.values():
    print(value)
